Improved Measurement of the Positive Muon Anomalous Magnetic Moment

Details Improved Measurement of the Positive Muon Anomalous Magnetic Moment Improved Measurement of the Positive Muon Anomalous Magnetic Moment

2000-09-12

arxiv.org/abs/hep-ex/0009029v1

Phys.Rev.D62:091101,2000

Physics

High Energy Physics

High Energy Physics - Experiment

4 pages, 4 figures. accepted for publication in Phys. Rev. D62 Rapid Communications

Scientific paper

10.1103/PhysRevD.62.091101

A new measurement of the positive muon's anomalous magnetic moment has been made at the Brookhaven Alternating Gradient Synchrotron using the direct injection of polarized muons into the superferric storage ring. The angular frequency difference omega_{a} between the angular spin precession frequency omega_{s} and the angular orbital frequency omega_{c} is measured as well as the free proton NMR frequency omega_{p}. These determine R = omega_{a} / omega_{p} = 3.707~201(19) times 10^{-3}. With mu_{mu} / mu_{p} = 3.183~345~39(10) this gives a_{mu^+} = 11~659~191(59) times 10^{-10} (pm 5 ppm), in good agreement with the previous CERN and BNL measurements for mu^+ and mu^-, and with the standard model prediction.

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